How to align vertically text on :hover - html

Question

The vertical alignment of the text on :hover isn't working . Also after hovering, the whole area of posts should be cover with pointer cursor and should be clickable, but it isn't.
HTML
<div class="photoset post-background">
<div class="imgoverlay text-light">
<a href="{Permalink}">
<div class="photos">
{block:Photos}
<img alt="" src="{PhotoURL-500}">
{/block:Photos}
</div>
<div class="overlay">
<span class="overlaycolor"></span>
<div class="overlayinfo">
{block:ContentSource}
<h6>{SourceTitle}</h6>
{block:ContentSource}
</div>
</div>
</a>
</div>
</div>
CSS
.imgoverlay {
position: relative;
overflow: hidden;
display: block;
max-width: 100%;
}
.imgoverlay img {
-webkit-transition: all .4s ease;
-moz-transition: all .4s ease;
-o-transition: all .4s ease;
-ms-transition: all .4s ease;
transition: all .4s ease;
}
.imgoverlay .overlay {
width: 100%;
height: 100%;
position: absolute;
top: 0;
left: 0;
z-index: 0;
opacity: 0;
filter: alpha(opacity=0);
-ms-filter: "alpha(Opacity=0)";
-webkit-transition: opacity .3s ease;
-moz-transition: opacity .3s ease;
-o-transition: opacity .3s ease;
-ms-transition: opacity .3s ease;
transition: opacity .3s ease;
}
.imgoverlay:hover .overlay {
opacity: 1;
filter: alpha(opacity=100);
-ms-filter: "alpha(Opacity=100)";
}
.imgoverlay .overlaycolor {
width: 100%;
height: 100%;
background: {color:Post Hover};
};
Example http://www.jnck.sk/
Thanks for any help!

Answer 1

Use span with display:block instead of div inside link. Block elements like div shouldn't be in inline blocks.
For vertical align of text you can use i.e. this:
.overlayinfo {
position: relative;
top: 50%;
transform: translateY(-50%);
}
http://zerosixthree.se/vertical-align-anything-with-just-3-lines-of-css/